private void ImportUst(string dir)
{
Clear();
Project = new Project(SingerManager.DefaultSinger);
SetProject();
var track = new Track(Project.DefaultSinger);
var part = track.AddPart();
Ust.Current.Import(part, dir);
PartEditor.Clear();
PartEditor.Part = part;
Settings.Current.LastFile = dir;
ImportTrack(track);
SetPosition();
}